What is this SWD error that occurs on loading a softdevice

[deepu]

Hello,

When i try to drop the softdevice to the mbed evaluation board it gives the error "SWD error",in a text document "fail.txt",in the MBED drive.

If it is successfully dropped then another error occurs on debugging the program to the evaluation board as "AGDI Cortex -M error-------cannot access memory".

how can i solve this issue ,is that something related to the debugging wire??

please help

[Håkon Alseth]

Hi,

AGDI is an API interface for Keil. Do you have an open debug session while copying in the softdevice to the MBED-drive?

If this still occurs, could you try to hold the RESET button for approx. 5 seconds while the mkit is powered? This will erase the nRF.

Are you running the latest mkit firmware for CMSIS-DAP?

Cheers, Håkon

[deepu]

No open debug sessions.

I tried erasing and reloading the softdevice ,still the error occurs.

And the firmware i am not sure i use "mbedWinSerial_16466.exe",is this what u mean??

[sukantan]

I am having similar issue. I was able to flash programs using SWD, but couldn't erase the softdevice. I saw a note in the forum to reset nrf51822 by holding RESET pin to ground for 5 secs. I started seeing this issue - "AGDI Cortex -M error-------cannot access memory(0xf0000ff0, Read, Acc Size 4bye)" after that. RESETing again doesn't help. Is the memory gone bad? Any other way to ascertain that board is unusable?